an introduction
foraminifera
classification area
eukaryotes
ruling era
Cromalfolate
Division (division is a law of composition that links the product of the first with two numbers…)
i would laugh
super amber
I would challenge
branch
foraminiferaDurbini, 1826 Categories Ranking (Mathematics in linear algebra, the rank of the vector family is a dimension…) Bottom
- atalamia
- polythalamus
- Xenophyophorea
- schizocladia
Evolutionary position
- eukaryotes
- Clade “Mr”
- estraminable
- i would laugh
- Alviolata
- Clade “Mr”
The foraminifera They are the protozoa that appeared in the Cambrian (Cambrian that spans from -542 ± 0.3 a…). The test (sometimes called, incorrectly, sea ​​shells), which consists of one or more rooms (or the place where shelter), with one or more perforations (openings). They have a way of living (life is the first name 🙂 benthic (in and in the sediments) or planktonic (in a column) Water (water is a chemical compound found everywhere on Earth, essential for everyone …), especially in the photoperiod).usually vary in size from 38 µm to 1 mm (some can exceed 10 cm) eat a diet (For human cultural diets see Practice…) Consists of bacteria (the bacteria ( bacteria) are single-celled prokaryotic organisms, characterized by…) algae and molluscs larvae, oysters (Crustaceans (crustaceans) are arthropods, that is, animals whose body…)Miscellaneous waste.
The story of its discovery
Painting from a Dorpigny book depicting foraminifera
In 1826 Alcide Dessalines d’Orbigny (1802-1857) created the order of foraminifera in a work entitled Systematic table of cephalopods. During his lifetime, Orbigny will describe 1,500 species, most of which are new to Science (science (Latin science, “knowledge”) is, according to the dictionary…). He was the first to study their lifestyle and environmental requirements. But the unicellular nature of foraminifera was discovered by FĂ©lix Dujardin (1801-1860) in 1835. It was through his study that he discovered the protoplasm of unicellular organisms.
Basic concepts of classification
The composition of this test (organic, binder, carbonate, silicon) is the main criterion for classifying foraminifera and is the basis of most classifications, including that of Loeblich and Tappan (1964 and 1988). foraminifera a Organic tests They are mainly represented by unicellular fascicles, Allogromiina (suborder). This suborder is still little known, since it is lost in fossil assemblages, it has been little studied by microbiologists. Now the Gooday group from Southampton (UK) is trying to catch up, everything (everything is understood as everything that exists more often than not the world or…) At least when you recognize them. foraminifera a Grouped tests It is characterized by the contamination of large sediment extracts (cf. Gudrina sp. , foraminifera in the lower left of the proposed tablet). Grain selection can occur in some species (e.g Saccammina micaceus, which only offers mica grains). Two types of foraminifera Carbonate tests can be distinguished. porcelain has a white side (white is the color of an object heated to about 5000°C (see…) Opaque, while hyaline is transparent and glassy. Finally, foraminifera rock tests Extremely rare. The second classification criterion is the design of the dressing rooms. Thus, we can distinguish several main types of tests:
- Single eye tests
- Multiple eye exams:
- Sequential tests, the boxes are arranged in a series (eg Gudrina s);
- Spiral tests (eg snails; the other three examples are on the board);
- disk tests
- Milliform tests. The lodges are formed successively and individually in several plans;
- complex tests.
The third criterion is the decoration of the test. The test can be smooth, but often has growths (ribs, spine, suture bridges, etc.) and depressions. Finally, the fourth criterion is the shape and location of the main opening. Thus, the opening is sometimes associated with additional elements (teeth, lips, plates, etc.) and/or the end of the neck.
microfossils (Microfossils are small fossils, the study of which requires resources…) Marine sediments that contain radioactive globules, spongy webs (small spines), planktonic foraminifera (small white shells) and benthic foraminifera (large white crust in the center of the image, plus small yellow shells made up of grains of sand). The diameter (In a circle or sphere, the diameter is a line segment passing through the center…) Average balls are about 0.5 mm. a sample (In general, a sample is a small amount of material, information, or…) of sediment washed and sieved to 125 µm (Eastern Weddell Sea, Antarctica).
Possible use of modern foraminifera
Ubiquitous in marine environments, they occupy a large number of ecological niches (from the swamp (In geography, a swamp is a kind of landscape formation, with little rest…) marine to the abyssal plains). Due to its short life cycle (from 1 to 3 months (A month (from the Latin mensis “month”, and previously plural “menstruation”) is a period of time…) in Do you know? (Average is a statistical measure which characterizes the elements of a set of…)1 year maximum), foraminifera react quickly to changes in the environment (the environment is everything that surrounds us. They are all natural elements and…). Its population may increase or decrease, its diversity may change, cells may grow or shrink… pollution (Pollution is defined as anything that makes the environment unhealthy. The definition varies depending of…) Environmental changes (for example, climate changes) can cause a drastic change in foraminiferal groups. Thus, its short life cycle and its ubiquitous presence in the marine environment are associated with a great wealth of sediments (analyses Statistics (statistics is a formal science, method and technique. It is…) powerful), which is a cheap and easy method of analysis and effect (TRACE is a NASA space telescope designed to study the relationship between…) In the fossil (derived from the Latin verb fodere: fossil, literally…) (The study is allowed before the modification of the environment) Make foraminifera, especially benthic, good biomarkers of environmental quality or agents of environmental change.